(function() {
    let t
    $.fn.extend({
        lazyLoad() {
            if (t) return
            t = setTimeout(() => {
                console.log(111);

                let h1 = window.innerHeight || document.documentElement.clientHeight
                let h2 = document.documentElement.scrollTop || document.body.scrollTop
                let totalTOP = h1 + h2
                let imgs = document.querySelectorAll('img')
                imgs.forEach((item, index) => {
                    let Top = item.offsetTop
                    if (Top <= totalTOP) {
                        item.src = item.getAttribute('data')
                    }
                })
                t = null
            }, 300)
        }

    })

})()